body{
    width: 100%;
    min-height: 1000px;
    background-color: pink;
    margin: 0px;
    padding: 0px;
}

#top{
    width: 700px;
    height: 200px;
    background-color: black;
    margin: auto;
}

#left{
    width: 250px;
    height: 450px;
    margin: auto;
    background-color: blue;
    margin-left: 85px;
    float: left;
}

#right{
    width: 450px;
    height: 450px;
    margin: auto;
    background-color: red;
    margin-right: 85px;
    float: right;
}

nav{
    width: 800px;
    height: 10px;
    margin: auto;
    line-height: 30px;
    position: relative;
    text-align: center;
}